Wrench.



PATENTED DEC. 13, 1904.

R. VROOMAN.

WRENCH.

APPLIOATION FILED MAR. 10, 1904.

NO MODEL.

- //7 van/J12 Woaman.

UNITED STATES Patented December 13, 1904.

RQBERT VROOMAN, OF FOSTORIA, OHIO.

WRENCH.

SPECIFICATION forming part of Letters Patent No. 777,573, dated December13, 1904.

Application filed March 10 190 Serial No. 197,497. (No modeld To allwhom it may concern:

Be it known that 1, ROBERT VROOMAN, a citizen of the United States ofAmerica, and a resident of Fostoria, in the county of Seneca and Stateof Ohio, have invented certain new and useful Improvements in Wrenches,of which the following is a specification.

This invention relates to certain new and useful improvements inwrenches of that class in which is provided a springactuated pawl forengagement with teeth or serrations on the body of the movable jaw.

The present invention has for its object, among others, to provide animproved and simplified construction of this character in which the lugon the handle portion shall serve as a stop to limit the movement of themovable jaw, as well as a support for the pivot of the pawl. The handlemay be in one piece with the fixed jaw, or it may be separable from theshank of said jaw, as may be deemed most expedient, the latter beingemployed where it is desired to make a separable construction forconvenience in carrying in a hand-bag or the like or for shippingpurposes, economizing space.

Other objects and advantages of the invention will hereinafter appear,and the novel features thereof will be specifically defined by theappended claim.

The invention is clearly illustrated in the accompanying drawings,which, with the numerals of reference marked thereon, form a part ofthis specification, and in which Figure 1 is a side elevation of myimproved wrench with a portion (the movable jaw) in section. Fig. 2 is adetail in longitudinal section, showing one way of making the handleportion in sections. Fig. 3 is a perspective view of the pawl removed.

Like numerals of reference indicate like parts in the several viewswhere they appear.

Referring now to the details of the drawings, 1 designates the fixed jawcarried at one end of the shank 2, which shank may be integral with thehandle portion 3, as shown in Fig. 1, or it may be separable therefrom,as shown in Fig. 2, and detachably connected with the handle portion 4in any suitable wayas, for instance, by forming the end of the shank 2with a tapered extension 5, fitted in a correspondinglyshaped socket 6in the adjacent end of the handle portion 4:, although this is but oneof the ways that the separable connection may be made. Screw-threadingor other means may be substituted, if desired.

'7 is the movable jaw. lt is provided with a hollow shank 8, whichreceives the shank 2 of the fixed jaw, as seen in Fig. 1, and thishollow shank is n'ovided with serrations or teeth 9 upon its under side,as seen clearly in Fig. 1.

The handle portion 3 when formed integral with the shank of the fixedjaw is formed with a lateral lug 10, in which is supported the pivot 11of the pawl 12, which is formed with a thumb-piece 13 at one end and theother end bent at substantially a right angle to its length to form thepawl-tooth 14, which is tapered or beveled as shown and adapted toengage the teeth 9 of the shank of the movable jaw, as shown in Fig. 1.The pawl is provided between its ends with an enlargement 15, having atransverse hole 16 to receive the pivot 11, which enlargement isreceived in a bifurcation of the lug 10, as will be readily understoodfrom Figs. 1 and 2.

The pawl near its thumb end is provided with a pin 17, as seen clearlyin Fig. 1, around which is placed a coiled spring 18, as seen in Fig. 1,the other end bearing against the under side of the handle and servingto normally keep the tooth of the pawl in engagement with the teeth 9.Pressure on the thumb-piece compresses the spring and removes thepawl-tooth from its engagement with the teeth 9 of the movable jaw.

hen the handle portion and the shank of the fixed jaw are formedseparately, the former is formed with a lug 19, having a hole 20 for thereception of the pivot of the pawl, as will be clearly understood fromFig. 2.

The lug 10, as well as the lug 19, has a substantially square front wall21, which serves as a stop to limit-the movement of the movable jaw, aswill be readily understood.

The mode of operation will be readily understood from theforegoingdescription when taken in connection with the annexed drawings, and afurther detailed description thereof does not seem necessary.

It is deemed important that the movable jaw have a hollow shank withelongated bearing on the shank of the fixed jaw and that the elongatedbearing have the teeth formed thereon with the teeth extending to thebase of the jaw, the end of the said hollow shank being adapted to havea firm contact with the square shoulder of the lug to limit the movementof the movable jaw, as by this means the strain is all borne by theshank of the fixed jaw and the movable jaw is better and more firmlyheld with its acting face parallel with the acting face of the fixedjaw.

hat is claimed as new is- As an improved article of manufacture, thewrench herein shown and described, comprising a fixed jaw, its shankwith handle portion, a removable jaw having integral hollow shankextended beyond the jaw to give an elongated bearing on the shank of thefixed jaw and receiving the shank of the fixed jaw, said hollow shankbeing formed with teeth upon its under side and extending to the base ofthe jaw thereof, said hollow shank being loosely slidable on the shankof the fixed jaw, a lug on the handle portion having a square shoulderin position to be engaged by the end of the hollow shank of the movablejaw, a toothed pawl pivoted on said lug, and adapted to engage directlythe teeth of the extended portion of the hollow shank, and a springdisposed between the handle portion and the thumb-piece of the pawl, allarranged and adapted to operate substantially as herein specified.

Signed by me at Fostoria, Ohio, this Qltll day of February, 1904.

ROBERT VROOMAN. Witnesses:

J. T. YANT, R. L. UNDERWOOD.

